The pope has how many? So bieberreligion of his own? Did beyonce lip-synch? Does it matter? It's coming weeks before her appearance at the super bowl. Cecilia vega has the story. Reporter: She has one of music's most angelic voices. For the first time, her nearly angelic image is taking a hit. Sn &#9834; say can you see &#9834; Reporter: All the buzz about the star-spangled serenade is now being overshadowed over questions about whether she really did belt it out live or l lip-synched? She has to be concerned about her vocal cords. Reporter: If it was too cold for beyonce, why wasn't it for kelly clarkson? Whose spokesperson says did sing live. In the past, some musical acts have pulled off faking it and had their careers survive. Others, not so much. Yo-yo ma admits he fudged his 2009 inaugural performance saying it was just too cold to play live. &#9834; On a monday &#9834; Reporter: Then, there was this, ashle re simpson seeming confused when the vocal track for the wrong song started playing. &#9834; What so proudly we hailed &#9834; Reporter: But perhaps the best comparison was whitney houston's star pangled banner at the super bowl. It went on to be one of her top ten selling singles. As allegations of star-spangled lip-synching surfaced, these pictures were on her blog. While the photos are still the flap. Spl she's been a public relations golden girl. It will do nothing for her image. Reporter: She's slated to headline the super bowl, where no doubt will now be focused on her lips. For "good morning america," cecel cecelilia vega, abc news, washington. Sh that wasn't the real joe biden. That was a stuntman. I don't think it's a big deal. I mean, she actually sang the song. It's not like milli vanilli where someone else sang it and she claimed it. I can't sing if a warm room. So -- we're going to find out,

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